Learn RR is a programming language. Show R is often used for statistical computing and graphical presentation to analyze and visualize data. Start learning R now »Examples in Each ChapterWith our "Try it Yourself" editor, you can edit R code and view the result. ExampleHow to output some text, and how to do a simple calculation in R: Result: Try it Yourself »ExampleHow you can use R to easily create a graph with numbers from 1 to 10 on both the x and y axis: Result:  We recommend reading this tutorial, in the sequence listed in the left menu. R ExercisesTest Yourself With ExercisesExercise:Insert the missing part of the code below to output "Hello World". Submit Answer » Start the Exercise My LearningTrack your progress with the free "My Learning" program here at W3Schools. Log in to your account, and start earning points! This is an optional feature. You can study W3Schools without using My Learning. R ExamplesLearn by examples! This tutorial supplements all explanations with clarifying examples. See All R Examples R QuizLearn by taking a quiz! This quiz will give you a signal of how much you know about R. Take the R Quiz I felt like I learned months in a week. I love how Codecademy uses learning by practice and gives great challenges to help the learner to understand a new concept and subject.Rodrigo Codecademy Learner @ UK R is hot. Whether measured by more than 10,000 add-on packages, the 95,000+ members of LinkedIn's R group or the more than 400 R Meetup groups currently in existence, there can be little doubt that interest in the R statistics language, especially for data analysis, is soaring. Why R? It's free, open source, powerful and highly extensible. "You have a lot of prepackaged stuff that's already available, so you're standing on the shoulders of giants," Google's chief economist told The New York Times back in 2009. Learn to use R: Your hands-on guide
Because it's a programmable environment that uses command-line scripting, you can store a series of complex data-analysis steps in R. That lets you re-use your analysis work on similar data more easily than if you were using a point-and-click interface, notes Hadley Wickham, author of several popular R packages and chief scientist with RStudio. [ Further reading: Learn R for beginners with our PDF. ]That also makes it easier for others to validate research results and check your work for errors -- an issue that cropped up in the news recently after an Excel coding error was among several flaws found in an influential economics analysis report known as Reinhart/Rogoff. The error itself wasn't a surprise, blogs Christopher Gandrud, who earned a doctorate in quantitative research methodology from the London School of Economics. "Despite our best efforts we always will" make errors, he notes. "The problem is that we often use tools and practices that make it difficult to find and correct our mistakes." Sure, you can easily examine complex formulas on a spreadsheet. But it's not nearly as easy to run multiple data sets through spreadsheet formulas to check results as it is to put several data sets through a script, he explains. Indeed, the mantra of "Make sure your work is reproducible!" is a common theme among R enthusiasts. Who uses R?Relatively high-profile users of R include: Facebook: Used by some within the company for tasks such as analyzing user behavior. Google: There are more than 500 R users at Google, according to David Smith at Revolution Analytics, doing tasks such as making online advertising more effective. National Weather Service: Flood forecasts. Orbitz: Statistical analysis to suggest best hotels to promote to its users. Trulia: Statistical modeling. Source: Revolution Analytics Why not R? Well, R can appear daunting at first. That's often because R syntax is different from that of many other languages, not necessarily because it's any more difficult than others. "I have written software professionally in perhaps a dozen programming languages, and the hardest language for me to learn has been R," writes consultant John D. Cook in a Web post about R programming for those coming from other languages. "The language is actually fairly simple, but it is unconventional." And so, this guide. Our aim here isn't R mastery, but giving you a path to start using R for basic data work: Extracting key statistics out of a data set, exploring a data set with basic graphics and reshaping data to make it easier to analyze. Why R is so popular?R is the most popular language in the world of Data Science. It is heavily used in analyzing data that is both structured and unstructured. This has made R, the standard language for performing statistical operations. R allows various features that set it apart from other Data Science languages.
What is R used for?R offers a wide variety of statistics-related libraries and provides a favorable environment for statistical computing and design. In addition, the R programming language gets used by many quantitative analysts as a programming tool since it's useful for data importing and cleaning.
Is R difficult to learn?R is known for being hard to learn. This is in large part because R is so different from many programming languages. The syntax of R, unlike languages like Python, is very difficult to read. Basic operations like selecting, naming, and renaming variables are more confusing in R than they are in other languages.
What does \r mean in programming?\r is a carriage return which often means that the cursor should move to the leftmost column, while \n is a line feed which moves the cursor to the next line.
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